#include <iostream>
#include <string>
using namespace std;

// 如果 ctr 大于 1，返回复数
string make_plural(size_t ctr, const string &word, const string &ending = "s") {
    return (ctr > 1) ? word + ending : word;
}

int main() {
    string plural = make_plural(2, "dog");
    cout << "dog 的复数为：" << plural << endl;
}